Fix GHA - copy extension script extension

Author: jimjam-slam

.github/workflows/check.yml

@@ -35,7 +35,7 @@ jobs:
           node-version: 20
 
       - name: Copy quarto-evelte extension
-        run: ./copy-extension
+        run: ./copy-extension.sh
         working-directory: ./docs
         shell: bash
 

.github/workflows/publish.yml

@@ -35,7 +35,7 @@ jobs:
           node-version: 20
 
       - name: Copy quarto-evelte extension
-        run: ./copy-extension
+        run: ./copy-extension.sh
         working-directory: ./docs
         shell: bash